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Finding the Fourth Proportional to 66,053.99, 99,057.09 and 28,105.80

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Solution

The fourth proportional to 66,053.99, 99,057.09 and 28,105.80 is: 42,148.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,053.99 : 99,057.09 = 28,105.80 : x
  2. Step 2: Convert to fraction form
    66,053.99/99,057.09 = 28,105.80/x
  3. Step 3: Cross multiply
    66,053.99x = 99,057.09 × 28,105.80
  4. Step 4: Simplify right side
    66,053.99x = 2,784,078,494.05
  5. Step 5: Solve for x
    x = 2,784,078,494.05/66,053.99
  6. Step 6: Final answer
    x = 42,148.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.